Answers

Subtract 40/7 from 21/24

1^st number: 21/24, 2^nd number: 5 5/7

21/24 - 40/7 is -271/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 7 is 168
   
   Next, find the equivalent fraction of both fractional numbers with denominator 168
2. For the 1st fraction, since 24 × 7 = 168,
   21/24 = 21 × 7/24 × 7 = 147/168
3. Likewise, for the 2nd fraction, since 7 × 24 = 168,
   40/7 = 40 × 24/7 × 24 = 960/168
4. Subtract the two like fractions:
   147/168 - 960/168 = 147 - 960/168 = -813/168
5. After reducing the fraction, the answer is -271/56

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